Publications by authors named "Taku Okamoto"

Tracheal injury during mediastinoscopic esophagectomy is a life-threatening complication that is challenging to manage. However, no precise treatment has been defined. An 80-year-old male patient with upper esophageal cancer underwent a mediastinoscopic esophagectomy and gastric tube reconstruction through the posterior mediastinal route.

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Pulmonary metastasectomy in colorectal cancer (CRC) has encouraging results; however, specific criteria for lung resection and the timing of resection remain undetermined. Therefore, in this study, we aimed to examine the long-term prognosis and 10-year survival rates and analyze poor prognostic factors in patients who underwent resection of pulmonary metastases from CRC. This retrospective, single-institution study included 156 patients with controlled primary CRC and metastases confined to the lungs or liver who underwent pulmonary metastasectomy between 2005 and 2022.

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Background: Sclerosing pneumocytoma is a benign tumor that occurs mostly in the lungs and very rarely in the middle mediastinum. It may be difficult to diagnose, as its radiological features and histologic heterogeneity mimic malignancy; therefore a histopathologic examination is required to establish a definitive diagnosis.

Case Presentation: The patient was a 52-year-old woman who was found to have a tumor in the middle mediastinum on a chest CT scan and was referred to our hospital for resection.

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Pulmonary diffuse lymphoid hyperplasia (DLH), a nonneoplastic lymphoproliferative disorder (LPD), is extremely rare, and no PET/CT findings have been reported for pulmonary DLH. We observed slowly expanding irregular opacities with 18 F-FDG accumulation (SUV max , 3.64) in the right lower lobe of a 51-year-old asymptomatic man.

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To reveal the diversity of Indonesian bent-toed geckos, we pay attention to Kalimantan (Borneo)an island which has received less attention than other Indonesian islands such as Sumatra, Java, Sulawesi, the Moluccas, and the Lesser Sunda archipelagos. About 30 years after Hikida (1990) described three new Cyrtodactylus from Borneo, four more species were described, namely C. limajalur and C.

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We investigated the geographic diversification of , which occurs in the central to northern parts of the Japanese Islands, based on a time-calibrated mitochondrial DNA (mtDNA) phylogeny and external morphological characters. The mtDNA phylogeny suggests that diverged from its sister species in western Japan 2.82-4.

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A 61-year-old woman, who was revealed to have a 11 mm pulmonary nodule in the right middle lobe by computed tomography, was diagnosed with adenocarcinoma using bronchoscopy. Fluorodeoxyglucose-positron emission tomography (FDG-PET) showed FDG accumulation in the tumor, with a maximum standardized uptake value( SUVmax) of 2.47.

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A 74-year-old man underwent right upper lobectomy and systemic lymph node dissection with video-assisted thoracoscopic surgery. Chylothorax occurred on postoperative day (POD) 1st. Under fasting management, the patient underwent pleurodesis on POD 5th and 7th, subcutaneous octreotide acetate injection on POD 6th, and lymphangiography on POD 9th.

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Purpose: Bronchopleural fistula (BPF) is a potential serious complication of lobectomy or more radical surgery for non-small-cell lung cancer (NSCLC). We aimed to evaluate the risk factors for BPF.

Methods: The study cohort comprised 635 patients who had undergone lobectomy or more radical surgery for NSCLC from March 2005 to December 2017.

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Objective: We report two cases of acute proximal anterior circulation occlusion after pulmonary lobectomy.

Case Presentation: Case 1 was a 64-year-old male who presented with occlusion of the right middle cerebral artery (MCA) one day after left lower lobectomy. Case 2 was a 68-year-old male who presented with occlusion of the right internal carotid artery (ICA).

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Background: Locating small, non-palpable lung tumors during video-assisted thoracoscopic surgery (VATS) is difficult. In this paper, we report a simple method to identify such tumors during VATS, using intraoperative computed tomography (IO-CT).

Methods: From 2015 to 2017, we performed IO-CT scans for patients who preoperatively seemed to have non-palpable lung tumors.

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The Chinese skink, (Gray, 1838), is widely distributed across continental China, Taiwan, the Korean Peninsula, and offshore islets, and consists of several subspecies. Here morphological and molecular methods have been used to reassess the taxonomic status and distributions of (Van Denburgh, 1912) and (Hikida, 1988), which are endemic to Taiwan and Green Island (an islet off the east coast of Taiwan), respectively. It can be confirmed that the eastern Taiwanese populations of exhibit similar juvenile color patterning and genetic composition to the islet subspecies , and are distinct from consubspecific populations in western Taiwan.

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Performance of thoracoscopic pulmonary segmentectomy for primary lung cancer or pulmonary metastases has recently increased. In patients with emphysema, identification of the intersegmental line is often difficult. For nonpalpable lesions, securing a sufficient surgical margin is more likely to be uncertain.

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An abnormal lung shadow was detected in a 39-year-old woman at physical examination and she was followed-up carefully at a nearby hospital. After 5 years follow-up, the patient was referred to our hospital for further examination of the abnormal shadow. A chest computed tomography(CT) scan revealed a 12 mm well-circumscribed nodular shadow in the right lower lobe.

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A 49-year-old man complaining of fever, chest pain, and hemosputum was examined at a local hospital. A chest computed tomography (CT) scan revealed a 35 mm mass shadow with cavity in the right upper lobe, but a transbronchial lung biopsy could not establish a complete diagnosis. After 1 month follow-up, the patient was referred to our hospital because the mass shadow wall remained thick despite the cavity shrinking.

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We report a case of solitary pulmonary metastasis from a phyllodes tumor of the breast appearing 16 years after initial surgery. The patient was a 56-year-old woman who had undergone surgical extirpation of a left breast tumor diagnosed as phyllodes tumor (borderline malignancy) in 1998, and a right breast tumor diagnosed as fibromatosis in 2000. Sixteen years after the initial operation, she consulted our hospital because of a chest X-ray abnormality detected at a screening examination.

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We report the case of a patient who had synchronous primary lung cancers in the left upper lobe (S(1+2)a, S(1+2)c), and underwent S(1+2) segmentectomy. The lesion in S(1+2)c was non-palpable, and the location was confirmed using intraoperative computed tomography (CT) scan. After A(1+2) and B(1+2) had been cut, the intersegmental border was marked with clips and intraoperative CT was performed.

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The patient was a 76-year-old man who had a prior history of recurrent pneumonia and severe, chronic sinusitis. Computed tomography showed a thymoma, and laboratory results revealed hypogammaglobulinemia. Therefore, Good's Syndrome (GS, rare adult-onset immunodeficiency with thymoma) was diagnosed.

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A 53-year-old man was referred to our hospital for treatment of two anterior mediastinal tumors. The anterior mediastinal tumors were resected by thymectomy under the probable diagnosis of double thymomas. The final pathological diagnosis was multiple thymic carcinoids.

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Objective: We investigated whether implantation of polylactic acid and epsilon-caprolactone copolymer (PLAC) cubes with or without basic fibroblast growth factor (b-FGF) released slowly from gelatin microspheres was able to induce fibrous tissue in the dead space remaining after pneumonectomy in the thoracic cavity.

Methods: Left pneumonectomy was performed in Japanese white rabbits. In the control group (n=6), the left thoracic cavity was closed without any treatment.

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Objective: To improve the prognosis of cN2, N3 non-small cell lung cancer, we performed induction chemoradiotherapy (carboplatin-taxane chemotherapy and concurrent 50-Gy radiation) followed by surgery.

Methods: Patients with pathologically proven non-small cell lung cancer with bulky cN2, N3 disease were enrolled. Forty-one patients underwent an operation after chemoradiotherapy from January 2000 to April 2006.

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Objective: The optimal surgical treatment for non-small cell lung cancer (NSCLC) with vertebral body invasion remains both controversial and challenging. We reviewed our experiences of NSCLC with vertebral body invasion, in which we have performed induction chemoradiotherapy followed by lung resection with en bloc partial vertebrectomy.

Methods: Six NSCLC patients with vertebral invasion underwent an operation following chemoradiotherapy from January 2001 to July 2006.

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The scincid lizard Plestiodon latiscutatus is found in the Izu Islands and Izu Peninsula of central Japan, whereas P. japonicus, a close relative, is found over the entire main island group of Japan, except the Izu Peninsula. The precise area of occupancy of these species was surveyed around the Izu Peninsula.

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We investigated the efficiency of basic fibroblast growth factor (b-FGF) released from a gelatin sponge in the regeneration of tracheal cartilage. A 1-cm gap was made in the midventral portion of each of 10 consecutive cervical tracheal cartilages (rings 4 to 13) in 15 experimental dogs. In the control group (n = 5), the resulting gap was left blank.

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